Work Plan - Persist Resize State

Request

The user wants resized areas (sidebar and pool) to be remembered (persisted) so they reopen with the same sizes.

DraftView.tsx:
- Updated initialization of sidebarWidth state to read from localStorage.getItem('draft_sidebarWidth').
- Added useEffect to save sidebarWidth to localStorage whenever it changes.
- Verified poolHeight persistence logic already exists.
DeckBuilderView.tsx:
- Updated initialization of sidebarWidth and poolHeightPercent to read from localStorage keys deck_sidebarWidth and deck_poolHeightPercent.
- Added useEffect hooks to persist both values to localStorage.
- Added useEffect to imports (fixed lint error).

Test: Refreshing the page after resizing the sidebar or pool panel should restore the previous dimensions exactly.